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Without seeing the error message you got, it's difficult to diagnose, however:-
If there are lots of files, your use of -name * unquoted may have expanded for each file so much that you exceeded...

By default find descends into all subdirectories.
The -prune is for NOT descending. For example
find . \! -name . -prune -type f -exec rm -f {} +
sets the prune flag for all directories but the...

I take it you want to leave all the directories intact, yes? Otherwise a simple rm -rf would suffice.

find . -name \* -type f -exec rm -f {} \;

Since you are not interested in the name of the...

A bit simpler, no memory hogger:


awk -F\| 'NR>1 {if (!X[$7]) X[$7] = ++CNT; print > (X[$7] "_" $7)}' file


If you have a large number of different output files (exceeding system limits)...

awk -F"|" 'NR>1 { a[$0]=$7 } END { for ( i in a ) print i > "1_"a[i] } ' input


If you have gigabyte files, a different approach would be needed to minimize memory usage, since array a would...

a) appending / prefixing the actual file name to the output file name would be way easier than inserting into the yn string. Try f=a FILENAME etc. If not happy with this, construct the f variable...

Try and adjust something like:
awk '{y=substr($2,1,4); f=b} y<lt{f=a} y>gt{f=c} {print>f} ' lt=2017 gt=2018 a=y1 b=y2 c=y3 infile
This should split the input file into the files y1, y2 and y3.

Hi rosebud123...

This is a working model.
I have used the '/tmp' directory for ease of testing.
READ THE NOTES INSIDE THE CODE!
#!/bin/bash
while read T
do ((CNT++))
for ((i=0;...

Howsoever, try
while read T
do ((CNT++))
for ((i=0; i<${#T}; i++))
do LC_ALL=C TMP=$(printf "%d\n" "'"${T:i:1})
[ $TMP -gt 127 ] && printf "%d %c %d\n"...